An 18-year-old white man suspected of fatally shooting 10 people in a Black neighborhood in Buffalo, New York, appears to be the latest in a line of "copycat" gunmen carrying out deadlier mass shootings inspired by previous attackers, experts warned on Sunday.

Payton Gendron, who surrendered to police on Saturday after the attack, apparently publicized a racist manifesto on the internet and broadcast the attack in real time on social media platform Twitch, a live video service owned by Authorities called the mass killing an act of "racially motivated violent extremism."

Experts say the trend of mostly young white men being inspired by previous racist gun massacres is on the rise, citing recent mass shootings, including the 2015 attack at a Black church in Charleston, South Carolina, a 2018 shooting at a synagogue in Pittsburgh, Pennsylvania and a 2019 attack at a Walmart in a Hispanic neighborhood of El Paso, Texas.